Routine Space Environment Product (Daily)
Issued by NWS

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000
FXXX12 KWNP 251230
DAYDIS

:Product: Forecast Discussion
:Issued: 2018 May 25 1230 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/wwire.html
#
#             Forecast Discussion
#
Solar Activity

.24 hr Summary...
Solar activity was very low with only B-class flare activity observed.
The largest flare of the period was a B9 at 24/1230Z from Region 2710
(N17E11). Regions 2711 (N04W61, Cso/beta) and 2712 (N17E49, Cso/beta)
were stable and mostly inactive. No CMEs were observed in available
SOHO/LASCO coronagraph imagery.

.Forecast...
Solar activity is expected to remain very low, with a chance of C-class
flares all three days (25-27 May).


Energetic Particle

.24 hr Summary...
The greater than 2 MeV electron flux was at normal to moderate levels
and the greater than 10 MeV proton flux remained at background levels.

.Forecast...
The greater than 2 MeV electron flux is expected to be at normal to
moderate levels again on day one (25 May) and increase to moderate to
high levels on days two and three (26-27 May) due to CH HSS influences.


Solar Wind

.24 hr Summary...
Solar wind parameters were indicative of the waning influences of a
positive polarity CH HSS. Solar wind speed decreased from about 475 km/s
to around 400 km/s. Total field strength was weak at 2 to 4 nT and only
weak Bz deviations were observed. The phi angle was primarily positive.

.Forecast...
CH HSS influences are expected to continue waning on day one (25 May)
and a return to a slow solar wind regime is anticipated for days two and
three (26-27 May).


Geospace

.24 hr Summary...
The geomagnetic field was quiet.

.Forecast...
The geomagnetic field is expected to be quiet on days one and two
(25-26 May) as CH HSS influences wane. Quiet to unsettled conditions are
expected on day three (27 May) due to the influence of a positive
polarity CH HSS.



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